Thank you for your quick response. Yes, old (existing) tabs work fine. I can open them edit them all good. I just cannot clone them. Because I was always using Style#21 I guess that style is no longer available. That’s why I cant clone old tabs.
More importantly, I try to create new tabs, I cannot see the preview below. Everything I create stays hidden somewhere that I cannot see or edit.
See here: https://prnt.sc/uof18n